Testing Solutions for Safe & Reliable Products

Our environmental chambers assist our customers in developing innovative next-generation products, ensuring safety and reliability through testing and validation.

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Battery Test Chambers are Supplied to a Variety of Industries.

We supply a variety of test chambers for testing small battery cells to large lithium ion battery packs.

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Supporting Safe & Reliable Products for all Industries

We help you test and validate your products so you can deliver them to the people who need them most.

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The Testing Standard

For the right testing solution, with the right team—turn to CSZ. We provide world-leading test chambers with the features you need, to deliver the value you’ve come to expect.

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Compact & Customizable Temperature Humidity Testing Solutions.

Test chambers for all your temperature and humidity testing needs with sizes from 1.2 to 96 cubic feet.

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Environmental Test Chambers

Supporting Safe & Reliable Products

People count on your products to be safe and reliable. CSZ environmental test chambers help manufacturers validate product reliability by simulating temperature, humidity, altitude, vibration, thermal shock, and other real-world environmental conditions. Since 1940, CSZ has provided standard and custom environmental chamber solutions for industries including aerospace, defense, automotive, electronics, energy, medical, pharmaceutical, and industrial manufacturing.

We offer a full range of standard and custom-designed environmental chambers providing solutions to meet demanding environmental testing requirements. Our customers also rely on our testing chambers to perform each and every day—and they rely on our team to do just the same. Between quality product design and the industry’s most reliable customer support, we deliver value and performance, both built to last.

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Why Choose Us?

1Over 80 years of experience providing environmental testing solutions to meet your needs & exceed your expectations.

2Committed to customer satisfaction from design to production to after sales support.

3Delivers highest quality and broadest line of environmental test chambers to give you a one stop testing solution.

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Temperature and Humidity Chambers

We offer a full selection of temperature test chambers and humidity chambers to suit any type of environmental testing need. These climate test chambers are available in a variety of sizes for basic temperature cycling to accelerated stress testing. (Learn More)

Stability Chambers

Used for testing and storing products in specific temperature and/or humidity conditions, these chambers are commonly used for R&D, clinical trials, ongoing stability storage/testing and more. CSZ stability chambers are also ideal for shelf life, steady-state and ICH-Q1A stability testing. (Learn More)

Walk-In / Drive-In Chambers

CSZ Walk-In Test Chambers are available in a variety of different models to meet virtually any size requirement and test application. Every chamber can be tailored to meet custom requirements and specifications. (Learn More)

Thermal Shock Chambers

Chamber design transfers product between two extreme temperature-controlled zones resulting in rapid product temperature changes that can quickly uncover product defects. (Learn More)

Altitude Chambers

CSZ Altitude test chambers utilize the combination of temperature and altitude to test components from an assortment of industries. These chambers are capable of controlling the temperature environment with various altitude conditions. (Learn More)

Vibration Test Chambers

Combining temperature and/or humidity, these chambers are designed to interface with vertical and horizontal electrodynamic or mechanical vibration systems. Models may be custom designed to meet unique test requirements. (Learn More)

HALT & HASS Chambers

HALT/HASS chambers, typically used during the product design and manufacturing cycles to identify weaknesses, are capable of providing extreme temperature and vibration rates. These chambers may be used to shorten time to market; increase product reliability and decrease warranty costs. (Learn More)

Industrial Freezers

Designed with heavy-duty construction, CSZ industrial freezers are built for ultra-low temperature operation and to last for years. These freezers are primarily used for age-hardening, stress relieving, expansion assembly, dimensional stabilization, epoxy storage, industrial cooling, heat treating and production chilling applications. (Learn More)

Exclusive Tundra® System

Our Patented refrigeration system design offers more performance and saves operating costs. Ideal for testing at -40°C and -50°C.

Battery Testing Chambers

We offer extensive experience providing battery test chambers for safe cell, module and pack testing.

Touch Screen Controller

Superior control system with swipe technology and features like remote control, data logging, graphs, security, multiple languages and more.

Industrial Ovens

Our Industrial ovens are ideal for heating, drying, curing, batch processing applications and more.

HALT HASS Chambers

Using temperature and vibration extremes during design and manufacturing stages help identify design and process weaknesses.

Stability Chambers

Use CSZ stability test chambers to test, validate or store your products in a variety of climatic conditions.

Case Study: Integrated Cold Bend Test Chamber for Wire and Cable

Integrated Cold Bend Test Chamber for Wire and Cable

This case study highlights a custom integrated cold bend test chamber designed for aerospace wire and cable testing. The system combines low-temperature environmental conditioning (–80°C to +85°C) with power-driven mandrel bending to improve repeatability, efficiency, and testing capacity for mission-critical applications.

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Environmental Testing for Drone Performance

Environmental Testing For Drone Performance

As drones operate in increasingly diverse and challenging environments-from urban delivery routes to military landscapes-the importance of rigorous environmental testing has never been greater.

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Cold Dual-Zone Environmental Chamber Enables Indoor & Outdoor Simulation

Custom Cold Dual-Zone Environmental Chamber Enables Indoor & Outdoor Simulation for Testing Window Assemblies

A custom, large-scale CSZ chamber to simulate both indoor and outdoor environmental conditions.

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Custom vibration test chamber for lithium-ion batteries meets unique space and safety challenges

Case Study: Custom vibration test chamber for lithium-ion batteries meets unique space and safety challenges

A leading global automaker needed a specialized vibration chamber to test lithium-ion battery packs for their electric vehicles. These large, heavy battery packs required a controlled environment for rigorous testing to ensure performance, reliability, and safety.

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Cold Chain Testing: Protecting Product Quality During Shipping

Cold Chain Testing: Protecting Product Quality During Shipping

Cold chain testing is a sophisticated product integrity testing process that safeguards sensitive products throughout their entire distribution lifecycle. The goal of environmental simulation chambers is to ensure that products maintain their quality, regardless of the transportation challenges they encounter.

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Electric Vehicles, Charging Infrastructure, and the Role of Test Chambers

Electric Vehicles, Charging Infrastructure, and the Role of Test Chambers

The electric vehicle (EV) market in the United States is experiencing significant growth, with its market share reaching 6.8% in May 2024. As these trends continue, the automotive industry is poised for transformation, driven by advancements in EV technology and an expanding network of charging infrastructure.

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Ensuring Solar Panel Reliability with CSZ Testing Chambers

Ensuring Solar Panel Reliability with CSZ Testing Chambers

Few industries have gone untouched by the adoption of Artificial Intelligence and the demand for high-performance computing continues to surge. To accommodate these advancements, computing power is compacted into a smaller footprint in high-density data centers.

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Maintaining Efficiency in AI Data Centers with Environmental Test Chambers

Maintaining Efficiency in AI Data Centers with Environmental Test Chambers

As companies begin constructing new solar plants and increasing the capacity of their existing facilities, manufacturers and researchers must perform rigorous environmental tests to determine the quality of their technology and ensure solar panels conform to industry standards and safety requirements.

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Case Study: Custom Walk-In Chamber Provides Solution for Testing Server Racks

Case Study: Custom Walk-In Chamber With Specialized Airflow Provides Solution for Testing Server Racks

A leading provider of technology infrastructure and software to facilitate the digital transformation of mission-critical businesses reached out to the CSZ team seeking a solution to test their server racks. Their specifications included a unique layout—two testing compartments within one walk-in chamber, separated by a removable wall.

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CSZ Test Chamber Supports BETA Technologies' Electric Aircraft R&D

CSZ Test Chamber Supports BETA Technologies' Electric Aircraft R&D

When electric aerospace company, BETA Technologies, approached the CSZ team for a consultation and purchase of a custom environmental test solution, we were excited to partner with an organization working to transform the landscape of air transportation. BETA Technologies’ ambitious pursuit of electric aviation. offers revolutionary potential for their larger goal of forging a path to zero-emission aviation.

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Innovative Testing Solutions for Next-Gen Batteries

Innovative Testing Solutions for Next-Gen Batteries

With higher energy density and improved safety compared to traditional lithium-ion batteries, all-solid-state batteries could enable the widespread adoption of electric vehicles and improve the efficiency of battery-powered devices. However, developing reliable solid-state batteries requires extensive research and testing to ensure their performance and safety.

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Environmental Testing: Paving the Way for Autonomous Driving

Environmental Testing: Paving the Way for Autonomous Driving

The race toward autonomous driving is reshaping the automotive industry as we know it. Autonomous vehicles (AVs) promise to revolutionize transportation, offering safer and more efficient mobility solutions. Along the road to widespread adaptation, autonomous vehicles and their components must undergo testing and validation to ensure their longevity, reliability, and safety under diverse and challenging conditions.

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Weiss Technik North America, Inc. Acquires Dynavac

Weiss Technik North America, Inc. Acquires Dynavac

Weiss Technik North America, Inc. (WNA) is pleased to announce it acquired all stocks of Vacuum Technology Associates, doing business as Dynavac. Dynavac is an innovative leader in high‐performance vacuum systems for space simulation and thin film deposition. Its products are sold primarily to the Aerospace, Defense, and precision optics industries.

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Tailored Solutions Safeguard Testing for Volatile Products

Tailored Solutions Safeguard Testing for Volatile Products

Recently, we had the opportunity to collaborate with a major designer and manufacturer of fuel delivery and thermal management systems. The customer approached us with a unique challenge: they required a specialized testing solution for their fuel valves. The goal was to design a test chamber that was capable of testing fuel valves while safeguarding the test environment against hazards that may arise during the testing of this volatile product.

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Cincinnati Sub‐Zero Partners with Testforce Canada

Cincinnati Sub‐Zero Partners with Testforce Canada to Distribute Environmental Testing Solutions for the Canadian Market

Cincinnati, OH, July 17, 2023 ‐ Cincinnati Sub‐Zero (CSZ) Products, a leading brand of environmental test chambers, is excited to announce a strategic partnership with Testforce Canada, a renowned technical distributor of test and measurement solutions. This collaboration signifies an achievement for both entities as they join forces to deliver environmental test solutions across Canada.

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New Stackable Benchtop Models Saves Floor Space and Doubles Test Capacity

New Stackable Benchtop Models Saves Floor Space and Doubles Test Capacity

Our new benchtop chambers provide customers with flexibility and is easily adapted for multiple use cases. The stackable configuration saves floor space for crowded test laboratories and doubles test capacity in the same footprint.

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CSZ Provides Bulk Cold Storage Solution for Vaccines

CSZ Provides Bulk Cold Storage Solution for Vaccines

As the need for vaccines and pharmaceuticals rise worldwide, CSZ BioStore® ultra-cold freezer rooms offer an ideal solution for customers with bulk cold storage requirements of vaccines. These freezer rooms address cold storage concerns of reliably storing material at consistently low temperatures.

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New Test Chamber to Test Orion Spacecraft

New Test Chamber to Test Orion Spacecraft

We completed installation of a temperature cycling chamber for testing NASA’s Orion spacecraft that will take humans back to the Moon and one day out to Mars.

Through collaboration between our expert design engineers and the Lockheed Martin team that is building Orion, we were able to provide the test solution Lockheed Martin needed for this mission critical project.
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New Upgrades to ZP Test Chambers with Customer Focus

New Upgrades to ZP Test Chambers with Customer Focus
Our team is focused on delivering the best test chamber in the industry. We have made several enhancements to our ZP test chambers as a result of our ongoing customer focus and continuous improvement efforts. Read More